Apparatus or tool for applying coating material



Y May 3,1927. 1 1,627,117

.1. .1. PREBLE' ET AL APPARATUS OR TOOL FOR-"APPLYING- COATING MATERIAL vFile- 1 March 15.'.1925 2 sweets-sheet 1 (kh l I w I 1927. May 3 J. J. PREBLE E'r AL APPARATUS 0R T0014 FOR APPLYING COATING MATERIAL Filed March 13. 1925 2 Sheets-Sheet 2 Patented May 3, 1927.

UNITED' STATES PATENT OFFICE..

, JAMEs JAEvIs PBEELE, E NEWTON, AND WAYNE B. THOMPSON, or wINcHEs'rEny MASSACHUSETTS, ASSIGNQRS T0 SPBACO PAINTING EQUIPMENT COMPANY, 0F BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

APPARATUS on Toon Eon .AEPEYING co'ATING MATERIAL..-

Application led March 13,` 1925,. Serial No. 15,288.

The present invention relates to coating apparatus and more particularly to spray Heretoforeit has been proposed to eject coating material from the spray gunl under pressure and to change its formation after ejection by directing diametrically lopposite and converging jets thereagainst to /effectthe flattening, spreading or fan-shaping thereof. Usually 'it is desirable to flatten the discharged coating material in either a vertical` orv a horizontal plane as a slight twist of the operators wrist takes care of intermediate planes. In order to flatten the discharged coating material in 4one of a plurality of planes it has been proposed heretofore to rotate the. member carrying the supplemental discharge jets. To-change the supplemental discharge from one plane to another involves the unlocking of the supplemental discharge member, its rotation to bring the supplemental discharge into the new plane, and the relocking of the member. After the supplemental discharge member is relocked it is often found that the member' has not been rotated into the desired plane or that the air ports are not properly registered with the supplemental air passages necessitating another unlocking, adjusting and relooking operation.

The object of the presentj invention .is to provide a spray gun which will be adapted to flatten the discharged coating in one ot' a plurality of planes in a quick, reliable and certain manner.

To the accomplishment of this object, and such others as may hereinafter appear, .the featuresv of the present invention relate to certain devices, combinations and arrangements of parts-hereinafter described and then set forthbroadly and in detail in the appended claims which possess advantages which will be apparent to those skilled in the art. ,Y

The various features ofv thef'presentl invention will be lreadily understood from an inspection of the accompanying drawings illustrating the best form of the linvention at present devised, in which,

Figure 1 is a front elevation of the spray `un;` g Fig.' 2'is -a left side sectional elevation,

3 which has integral therewith or suit-v ably attached thereto a handle or extension 4. The motive agent, which may be airunder pressure, is preferably introduced into the body portion 3. through the handle 4 and for that purpose we have herein shown an air passage 5 which is connectedto an air hose'(not shown) through an air-hose coupling 6 fitted to the lower Aend of the passage 5 and held in place on the handle 4 ,by a set screw 7 To remove particles of dirt or other foreignmatter from the inliowing' motive agent and prevent 'their entrance into the body of the tool, the coupling carries a perforated conical member 8, which extends into the passage 5. Y

At its upper orleading end the air passage 5 communicates with a horizontal passage 9 extending completely thr-ough the upper portion of the handle 4. The passage 9 is interiorly threaded to receive three parts, namely, a plug 10 which closes one end of the passage, a valve casing 11 whichy closes the other end of the passage, and a central hollow stop 12 whichdetermines the operative position of the valve casing 11 within the passage. The interior of the stop l2 is frusto-conical in' shape in order to` permit the insertion into the stop of an expanding tool which expands the stop to wedge its exterior threads into the threads in the passage 9 and thus lock the stop in a fixed position. Interposed between.V the valve casing 11 and stop 12 is a lead washer 13 which prevents the air leaking out between-the casing and the stop into theA held upon the seat 14 by a coiled spring 18 interposed between the valve 16` and the plug 10.` Near its outer end the spindle 17 passes through suitable packing shown0 as a gland packlng 19, mounted in a cavity 20, formed in the valve casing v11, and held in place therein by 'a gland' or plug 21 threaded into the cavity 20. The motive agent, such as air under pressure entering through the passages 5 and 9, passes through the air valve 16vwhen open, and enters aqpassage 22 which conducts the airv to a longitudinal ychamber 23 having a passage 24 which opens on the front face 25 of the body portion.

The coating material, such as paint, lacquer, and the like, may be introduced into the body 3, under pressure, by threading a hosecoupling (not shown) to a pipe 26 depending fromvtlie body portion. The pipe 26 is provided with a passage 27 which conducts the coating material into a .chamber 28 opening upon the face 25 of the body portion. With this cbnjstruction the air chamber 23 andthe paint chamber 28 are always out of communication with each otherwithin the body of the gun;

,The forward or discharge end of the chamber 28 is internally threaded to receive a threaded nozzle 29 through which the -coating material is discharged from the gun. The nozzle 29-is provided with a sub- `st-antially hexagonal surface 30, a tapered portion 31, and a cylindrical or conical discharge ytip 32.

Extending longitudinally through the chamberx28 and substantially axially thereof is a yneedle or spindle 33 vhaving a tip 34 formed on its forward end provided with o surfaces shaped to engage the surfaces 31 and 32, respectively, and thus act as a valve to shut off the discharge of coating material.

The rear end of the chamber 28 is closed by packing 35 through which the spindle 33 extends. The packing 35 is held in place by a packing or gland plug 36 threaded into the body 3. The spindle 33 may be withdrawn" from or inserted into the chamber 28 while the packing 35 is in place as the reduced end of the spindle passes through the packing without plcking up strands thereof The rear end of the spindle 33 is secured to a guide 37 arranged to move in ajlo'ngitudibore or spring chamber 38 formed in the body 3. The guide 37 is provided with a mounted in a plug 41 threaded into the body 3. The spindle 33 is actuated in a direction keep the coating material discharge orifice normally closed by a spring 42 coiled about the stem 39 and interposed between the inside faces of the plug 41 and guide 37. In order to move the spindle 33 in a direction to open the coating material discharge orifice against the tension of the spring 42 the central portion of a strap yoke 43 is loosely interposed between an adJusting nut l44, on the sleeve'40,

.vided with a vertical and the plug 41. The free ends of the yoke extend alon the opposite sides of the body portion'antI are connected by pivot pins 45 to the arms 46 of a yoke or lever arm 47 embracing the body 3 and pivoting on ahorizontal pin 48 carried by the body 3.

The inner face of the lever arm 47 enl gages the spindle 17 of the air valve 16. The yoke arm 47 thus operates to open both the air and coating material valves when the rarm 47 is actuated-against the tensions of the springsA 18 and 42 which cloe the valves when the yoke-arm 47 is released. As sufficient play is provided for the yoke 43 before it engages, the nut 44 the air ,valve will be opened before the coating material valve opens and the air valve will be closed after the coating material valve is closed.

In order to actuate the yoke army 47 its lower end is curved to form a grip 49 for a plurality'of the fingers of the hand of the operative grasping the tool handle, which is provided with a conveniently located finger rest and positioning member 50. The tool handle 1s also provided with a smooth under face 51 which is adapted to seat upon the hand of the operative grasping the handle to assist him in supporting the tool. From an inspection of Fig. 2 it will be apparent that the handle 4 below the linger rest 50 is narrower than the portion of the handle .above the rest by substantially the width 0f the grip 49. This construction is .provided so that when the grip 49 is drawn towards the handle 4 in actuating the valves 16 and 34 the combined handle and grip vengaged by the index and second finger will have substantially the same width or girth as the portion of the handle engaged adjacent lingers.

In order to provide a discharge nozzle fdr the air the front face seat 52 of vreduced diameter upon which a main air discharge nozzle 53 is seated concentric with the inner nozzle 29. The nozzle 53 has an internal surface spaced from the external surface of by the little and of the body' 3 is pro` RUG' the nozzle 29 throughout its length so that air can passout of the passage 24 and be discharged from the gun.

The spray gun embodying our present ini' eating with 'the supplemental air body by a suitable locking means shown as an internally threaded collar or nut 58 having an inturned flange 59 to engage the nozzle" 53. The outer-'face of the nozzle 53 is provided with a pair of diametricallyv op-v osed jet members 60`and 61 arranged in a vertical plane and having the inwardly d-irected air passages 62 and 63 in communica-A tion with the air passage 57. rlhe outer face of the nozzle 53 is also provided with a pair of diametrically opposed jet mem-- bers 64 and 65 (Fig. 3) arranged in a horizontal plane arrd having the inwardly directed air passages 66 and 67 `in communi,-

.cation with the air passage'56.

In order todetermine readily the plane of the supplementall discharge, that is,

whether the supplemental airis to be discharged through'the jet members 60 and 61 or through the jet members 64 and 65, we interpose between the passage 24 and. supplemental air passages 54 and 55 a hollow valve 68 rotatably mounted in a boss 69 on the body 3 and held therein by a ca 70 internally threaded to engage a threat on `the boss. The valve'68 is provided with a port 71 'arranged in the same horizontal plane' as the passage 54. The valve 68 is also providedl with a port72 arranged in the same horizontal plane as the passage but of-' set at an angle of ninety degrees from the port 71. The valve 68 is provided with a lateral handle 73 through which the operative may rotate the valve and thus register the port 72 with the passage 55 to provide for the supplemental discharge through the vertical jet members and 61. By turning the valve 68,' through an arc of ninety degrees the port 7 2 may be withdrawn from the passage 55 and the port 71Iregifstered with the passage 54 to provide. for the supplemental discharge through the horizontal jet members 64 and 65.

The valve 68 .also providesV means for readily controlling th'e volume of the supplemental air discharge as the handle 73 may be moved into a position where. it extends at an angle of forty-five degrees from the position illustrated in Fig. 1. -In this position the supplemental vdischarge is shut o. After either of the ports 7l or 72 is brought into registry with the passages ,54 or 55 the handle 73 may be manipulated to partially close the open ort and thus vary the amount of airpassing'f'to the supplemental discharge jets.

lVhen' it is desired to admit' coating material not under pressure to the spray gun vthe material hose (not shown) is dlsconnected and a vented closure y,74 is v threaded on the lower end of the pipe 26. To 'this end the closure 74 is provided with a central hollow boss 75 threaded interiorly on opposite sides of the closure. Near its lower end the pipe 26 is shapedto fit a seat?I 7 6 formed on the boss 75 to .insure a tight joint. The lower threads on the boss 75 are engaged by outer threads on a pipe 77 extending down towards the bottom of a container 78 which contains the coating material. The lower fend of the pipe 77 is bent towardsthe fronto f the container-78 so that the open end of the pipe is directed towards the. angle between the bottom of the container and that which lies inl the vertical plane passing throughthe longitudinal-axis of the gun. lVith this construction the operative may continue to operate the gun with its nose pointed downwardly,when the material in the container becomes' low, without danger of uncovering the open end of the pipe 77 and thus breaking the suction.

portionA ofthe front wall ofthe container In order to attach the container 78 to the i closure 74 we'have provided a turned over j or otherwise reinforced portion 79 at the upper end of the container whereon are provided a plurality of preferably equally spaced, laterally projecting lugs 80. .The

lugs -8O are shown as rivets or may bd formed integrally wit-h the container, if desired, and are adapted to cooperate with a suitable receiving formation on fthel closure 74. To this end the closure 74 is provided with a circumferential-HyA dependino skirt 81 having a seriesof partial threads, wed e formations or the like 82, forming slight y inclined tracks or grooves 83 in which the lugs 80 may be received. The grooves 83 terminate at their lower' ends in a downwardly open notch or recess 84, spaced/similarly to the lugs 80 and of a dimension to ice receive the same. The tracks 83 may be l j for ied by 'a thread the continuit of'whch he thread withinl the skirts of the closure with thel i lugs 8() ositionedjn the respectivenotches 84 and t en relatively to rot-ate slightly the "container ad'closure in a direction to cause the lugs 80 Ito rideup the tracks or grooves 83, whereby `the mouth of the container is wedged up against a gasket 85 on the under side of the closure v74. Removal of the container may l,be subsequently readily effected by a similar but reverse operation.

The

gasket 85 has a'larger`diameter than the smallest'diameterfof the skirt. 81 so that the gasket 85may not drop out of position. when the container is removed. i

While in the preferred form of our in.-

vention we have provided four sup lemental discharge jets with means forse eating at isp will the plane of the discharge, it` will be apparent to those skilled in the art that the supplemental jet member may be provided with a greater number of su 'plemental air jets controlled by a valve having an'increased 'number ot' ports if it should bc desired to provide for the flattening of the discharged. coating material in more than two planes.

lVhat is claimed as new, is:

l. A spray gun, having, in combination, means to supply coating material, means to subject'the same to the actionof a motive agent thereby effecting the-l discharge of the coating material, amember j through which the motive agent may be discharged supplelmentally upon the discharged coating inateri'al, and means independent of the member for determining the plane of the supplemental discharge.

2. A spray gun, having, in combination,

means to supply coating material, means to subject t-lie same to the action of a motive agent thereby effecting the discharge of :the coating material, a member through which the motive agent ma be discharged supple`- mentally upon the ischarged coating material in one of a plurality of planes, and means independent of the member for dedischarge.

termining the plane of the supplemental' 3. A spray gun, having, in con'ibinatioi.,

means to supply coating material, means to subject the saine to the action of a motive agent thereby effecting the :discharge of the coating material, a member through which the mot-ive agent may be discharged supplementally upon -the discharged coating maiterial and provided 4with supplemental discharge passages occupying discharging positions in two planes or lines which are substantially' normal to each other, and means independent of the member for determining the plane of the supplemental discharge.

4. A spray gun, having, in combination, means to supply coating material, means to subject the same to the action of a. motive agentthereby effecting the discharge offthe coating material, a member through which the motive agent may be discharged supple-.

mentally upon the discharged coating inaterial and provided with'a plurality of pairs of discharge passages, and means independent of the member for determining the pair of discharge passages through which the motive agent is supplementally discharged.

5.- A spray un, having, in combination, means to supp y coating inatei'ial,means to subject the same to the action o'f a motive agent thereby effecting the dischanrge of the coating material, a fixed member through which the motive agent may be discharged supplemcntally upon the discharged coating material, said member having opposed supplemental discharge passages occupying dis- 4and means for determining charging positions in two planes or lines which are substantially normalto each' other, and means to vary the supplemental discharge of the motive agent.

6. A spray gun, having, in combination, means to supply coating material, means to subject the same to the action of a motive agentv thereby eifecting the discharge ofthe coating material, a. fixed Amember through which the motive agent ma be discharged supplementally upon the iscliarged coating material, said member having opposed supplemental discharge passages occupying discharging positionsin two planes or lines which are substantially normal to each other, the plane of the supplemental discharge.

7. A spray un, having, in combination, means to supp y coating material means to subject the same' tothe action o1g a motive agent thereby effecting the discharge o'f the coating material, a iixed member through which the motive agent may be discharged supplementally upon vthe discharged 'coating material, said member having opposed supdischarge passages occupying displeinental charging positions in two planes or lines which are'substantially normal to each other,-

40' material y having means to admit coatm and a motive agent, an inner holow me'mber forming a discharge nozzle for the coating material, an outer a plying coat-` hollow mcmber concentrically' mounted with relation to the inner hollow member and spaced therefrom to form a dis- Ril charge nozzle for the motive agent, means Y. .1

for supplementally discharging motive agent -upou the main discharge to lHatten or spread the same including a pair of supplemental motive agent passages in said bod two pairs of opposite jet members on sai outer member having continuous 4communication with at least one of said supplemental motive agent passages, and means for selectively contrglling said supplemental mot-ive agent passages.

9. An apparatus or toolfor applying coating comprising a body vhaving passa admitting coating materialA and a motive agent, an inner hollow member formin discharge nozzle for the coating material,

an outer .hollow member concentrically mounted with relation tothe inner hollow member and spaced therefrom toform a dis charge nozzle forA the motive agent, means for suppleinentally discharging motive agent upon the main discharge toflatten oi' spread the saine including a pair of supplemental motive agent passages in said ybod two pairs of opposite jet members on sai outer member having a continuous communication di with at least one of'said supplemental motive agent passages, a hollow valve member having continuous communication with the main motive agent passage and having ports arranged lto connect the main niotive agent passage with at least one of the supplemental motive agent passages. a

10. An apparatus or tool for applying coating comprising a body having passages admitting'coating material and a motive agent, and a fixed supplemental discharge i member having opposed supplemental dis-I charge passages occupying in pairsv discharging `posltions in two planes or lines which are substantially normal to each other, said member having two pairs of motive agent passages leading respectively to the pairs of discharge passages, and said body having a number of spaced supplementaly motive agent passages constituting a multiple of two, and respectively in communication with the pairs of motive agent passages in saidmember.

11. An apparatus or -tool for applying coating comprising a body having passages admitting coati-ngmaterial and a motive agent, and a fixed supplemental discharge member having opposed supplemental-discharge passages occupying in pairs discharging positions in two planes or lineswhich j are Substantially normal to each other, said member having two pairs of motive agent passages leading respectively to thepairs of supplemental discharge passages, a`nd` said body having a number .of spacedsupplemental motive agent passages constituting amultiple of two, and respectively in communication with the pairs of motive agent passages in said member, and a valve having at least ,two ports controlling the su plemental motive agent passages inthe liody for determining the plane of the supplemental discharge.

In testimony whereof we have signed our names to this speclficatlon.

JAMES JARvIs PREBL'E. WAYNE B..THoMPsoN. 

